101
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Yuan Q, Chen M, Yang W, Xiao B. Circadian Rheb oscillation alters the dynamics of hepatic mTORC1 activity and mitochondrial morphology. FEBS Lett 2020; 595:360-369. [PMID: 33247956 DOI: 10.1002/1873-3468.14009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 11/06/2020] [Accepted: 11/13/2020] [Indexed: 02/05/2023]
Abstract
The morphological structure and metabolic activity of mitochondria are coordinately regulated by circadian mechanisms. However, the mechanistic interplay between circadian mechanisms and mitochondrial architecture remains poorly understood. Here, we demonstrate circadian rhythmicity of Rheb protein in liver, in line with that of Per2. Using genetic mouse models, we show that Rheb, a small GTPase that binds mTOR, is critical for circadian oscillation of mTORC1 activity in liver. Disruption of Rheb oscillation in hepatocytes by persistent expression of Rheb transgene interrupted mTORC1 oscillation. We further show that Rheb-regulated mTORC1 altered mitochondrial fission factor DRP1 in liver, leading to altered mitochondrial dynamics. Our results suggest that Rheb/mTORC1 regulated DRP1 oscillation involves ubiquitin-mediated proteolysis. This study identifies Rheb as a nodal point that couples circadian clock and mitochondrial architecture for optimal mitochondrial metabolism.
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Affiliation(s)
- Qiuyun Yuan
- Neuroscience & Metabolism Research, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Mina Chen
- Neuroscience & Metabolism Research, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Wanchun Yang
- Neuroscience & Metabolism Research, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China.,Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu, China
| | - Bo Xiao
- Department of Biology, Southern University of Science and Technology, Shenzhen, China
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102
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Webb BA, Aloisio FM, Charafeddine RA, Cook J, Wittmann T, Barber DL. pHLARE: a new biosensor reveals decreased lysosome pH in cancer cells. Mol Biol Cell 2020; 32:131-142. [PMID: 33237838 PMCID: PMC8120692 DOI: 10.1091/mbc.e20-06-0383] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Many lysosome functions are determined by a lumenal pH of ∼5.0, including the activity of resident acid-activated hydrolases. Lysosome pH (pHlys) is often increased in neurodegenerative disorders and predicted to be decreased in cancers, making it a potential target for therapeutics to limit the progression of these diseases. Accurately measuring pHlys, however, is limited by currently used dyes that accumulate in multiple intracellular compartments and cannot be propagated in clonal cells for longitudinal studies or used for in vivo determinations. To resolve this limitation, we developed a genetically encoded ratiometric pHlys biosensor, pHLARE (pHLysosomal Activity REporter), which localizes predominantly in lysosomes, has a dynamic range of pH 4.0 to 6.5, and can be stably expressed in cells. Using pHLARE we show decreased pHlys with inhibiting activity of the mammalian target of rapamycin complex 1 (mTORC1). Also, cancer cells from different tissue origins have a lower pHlys than untransformed cells, and stably expressing oncogenic RasV12 in untransformed cells is sufficient to decrease pHlys. pHLARE is a new tool to accurately measure pHlys for improved understanding of lysosome dynamics, which is increasingly considered a therapeutic target.
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Affiliation(s)
- Bradley A Webb
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
| | - Francesca M Aloisio
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
| | - Rabab A Charafeddine
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
| | - Jessica Cook
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
| | - Torsten Wittmann
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
| | - Diane L Barber
- Department of Cell and Tissue Biology, University of California, San Francisco, San Francisco, CA 94941
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103
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Gnanapradeepan K, Leu JIJ, Basu S, Barnoud T, Good M, Lee JV, Quinn WJ, Kung CP, Ahima R, Baur JA, Wellen KE, Liu Q, Schug ZT, George DL, Murphy ME. Increased mTOR activity and metabolic efficiency in mouse and human cells containing the African-centric tumor-predisposing p53 variant Pro47Ser. eLife 2020; 9:e55994. [PMID: 33170774 PMCID: PMC7661039 DOI: 10.7554/elife.55994] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 10/28/2020] [Indexed: 01/24/2023] Open
Abstract
The Pro47Ser variant of p53 (S47) exists in African-descent populations and is associated with increased cancer risk in humans and mice. Due to impaired repression of the cystine importer Slc7a11, S47 cells show increased glutathione (GSH) accumulation compared to cells with wild -type p53. We show that mice containing the S47 variant display increased mTOR activity and oxidative metabolism, as well as larger size, improved metabolic efficiency, and signs of superior fitness. Mechanistically, we show that mTOR and its positive regulator Rheb display increased association in S47 cells; this is due to an altered redox state of GAPDH in S47 cells that inhibits its ability to bind and sequester Rheb. Compounds that decrease glutathione normalize GAPDH-Rheb complexes and mTOR activity in S47 cells. This study reveals a novel layer of regulation of mTOR by p53, and raises the possibility that this variant may have been selected for in early Africa.
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Affiliation(s)
- Keerthana Gnanapradeepan
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
- Graduate Group in Biochemistry and Molecular Biophysics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Julia I-Ju Leu
- Department of Genetics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Subhasree Basu
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
| | - Thibaut Barnoud
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
| | - Madeline Good
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
| | - Joyce V Lee
- Department of Cancer Biology, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - William J Quinn
- Department of Physiology and Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Che-Pei Kung
- Washington University in St. LouisSt LouisUnited States
| | - Rexford Ahima
- Division of Endocrinology, Diabetes & Metabolism, Johns Hopkins University School of MedicineBaltimoreUnited States
| | - Joseph A Baur
- Department of Physiology and Institute for Diabetes, Obesity, and Metabolism, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Kathryn E Wellen
- Department of Cancer Biology, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Qin Liu
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
| | - Zachary T Schug
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
| | - Donna L George
- Department of Genetics, Perelman School of Medicine, University of PennsylvaniaPhiladelphiaUnited States
| | - Maureen E Murphy
- Program in Molecular and Cellular Oncogenesis, The Wistar InstitutePhiladelphiaUnited States
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104
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Ramaian Santhaseela A, Jayavelu T. Does mTORC1 inhibit autophagy at dual stages?: A possible role of mTORC1 in late-stage autophagy inhibition in addition to its known early-stage autophagy inhibition. Bioessays 2020; 43:e2000187. [PMID: 33165974 DOI: 10.1002/bies.202000187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 10/13/2020] [Accepted: 10/13/2020] [Indexed: 11/09/2022]
Abstract
Extensive studies have attributed the lysosomal localization of the mechanistic target of rapamycin complex 1 (mTORC1) during its activation. However, the exact biological significance of this lysosomal localization of mTORC1 remains ill-defined. Interestingly, findings have shown that localization of the lysosome itself is altered under conditions influencing mTORC1 activity. In this perspective, we hypothesize that the localization of mTORC1 and lysosome could be interconnected in a way that manifests regulation of autophagy that is already under progression at the time of mTORC1 activation. This provides a new possibility for autophagy regulation whose complete mechanistic insights remain to be determined.
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105
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Abstract
Circadian rhythms govern a large array of physiological and metabolic functions. Perturbations of the daily cycle have been linked to elevated risk of developing cancer as well as poor prognosis in patients with cancer. Also, expression of core clock genes or proteins is remarkably attenuated particularly in tumours of a higher stage or that are more aggressive, possibly linking the circadian clock to cellular differentiation. Emerging evidence indicates that metabolic control by the circadian clock underpins specific hallmarks of cancer metabolism. Indeed, to support cell proliferation and biomass production, the clock may direct metabolic processes of cancer cells in concert with non-clock transcription factors to control how nutrients and metabolites are utilized in a time-specific manner. We hypothesize that the metabolic switch between differentiation or stemness of cancer may be coupled to the molecular clockwork. Moreover, circadian rhythms of host organisms appear to dictate tumour growth and proliferation. This Review outlines recent discoveries of the interplay between circadian rhythms, proliferative metabolism and cancer, highlighting potential opportunities in the development of future therapeutic strategies.
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Affiliation(s)
- Kenichiro Kinouchi
- Center for Epigenetics and Metabolism, U1233 INSERM, Department of Biological Chemistry, University of California, Irvine, CA, USA.
- Department of Endocrinology, Metabolism, and Nephrology, School of Medicine, Keio University, Tokyo, Japan.
| | - Paolo Sassone-Corsi
- Center for Epigenetics and Metabolism, U1233 INSERM, Department of Biological Chemistry, University of California, Irvine, CA, USA.
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106
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Boon R, Silveira GG, Mostoslavsky R. Nuclear metabolism and the regulation of the epigenome. Nat Metab 2020; 2:1190-1203. [PMID: 33046909 DOI: 10.1038/s42255-020-00285-4] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 08/25/2020] [Indexed: 12/18/2022]
Abstract
Cellular metabolism has emerged as a major biological node governing cellular behaviour. Metabolic pathways fuel cellular energy needs, providing basic chemical molecules to sustain cellular homeostasis, proliferation and function. Changes in nutrient consumption or availability therefore can result in complete reprogramming of cellular metabolism towards stabilizing core metabolite pools, such as ATP, S-adenosyl methionine, acetyl-CoA, NAD/NADP and α-ketoglutarate. Because these metabolites underlie a variety of essential metabolic reactions, metabolism has evolved to operate in separate subcellular compartments through diversification of metabolic enzyme complexes, oscillating metabolic activity and physical separation of metabolite pools. Given that these same core metabolites are also consumed by chromatin modifiers in the establishment of epigenetic signatures, metabolite consumption on and release from chromatin directly influence cellular metabolism and gene expression. In this Review, we highlight recent studies describing the mechanisms determining nuclear metabolism and governing the redistribution of metabolites between the nuclear and non-nuclear compartments.
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Affiliation(s)
- Ruben Boon
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
- The Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Giorgia G Silveira
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA
- The Broad Institute of Harvard and MIT, Cambridge, MA, USA
| | - Raul Mostoslavsky
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, USA.
- The Broad Institute of Harvard and MIT, Cambridge, MA, USA.
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107
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Hu PS, Li T, Lin JF, Qiu MZ, Wang DS, Liu ZX, Chen ZH, Yang LP, Zhang XL, Zhao Q, Chen YX, Lu YX, Wu QN, Pu HY, Zeng ZL, Xie D, Ju HQ, Luo HY, Xu RH. VDR-SOX2 signaling promotes colorectal cancer stemness and malignancy in an acidic microenvironment. Signal Transduct Target Ther 2020; 5:183. [PMID: 32900990 PMCID: PMC7479104 DOI: 10.1038/s41392-020-00230-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 05/10/2020] [Accepted: 06/10/2020] [Indexed: 12/21/2022] Open
Abstract
The acidic tumor microenvironment provides an energy source driving malignant tumor progression. Adaptation of cells to an acidic environment leads to the emergence of cancer stem cells. The expression of the vitamin D receptor (VDR) is closely related to the initiation and development of colorectal carcinoma (CRC), but its regulatory mechanism in CRC stem cells is still unclear. Our study revealed that acidosis reduced VDR expression by downregulating peroxisome proliferator-activated receptor delta (PPARD) expression. Overexpression of VDR effectively suppressed the stemness and oxaliplatin resistance of cells in acidosis. The nuclear export signal in VDR was sensitive to acidosis, and VDR was exported from the nucleus. Chromatin immunoprecipitation (ChIP) and assay for transposase-accessible chromatin with high-throughput sequencing (ATAC-seq) analyses showed that VDR transcriptionally repressed SRY-box 2 (SOX2) by binding to the vitamin D response elements in the promoter of SOX2, impairing tumor growth and drug resistance. We demonstrated that a change in the acidic microenvironment combined with overexpression of VDR substantially restricted the occurrence and development of CRC in vivo. These findings reveal a new mechanism by which acidosis could affect the stemness of CRC cells by regulating the expression of SOX2 and show that abnormal VDR expression leads to ineffective activation of vitamin D signaling, resulting in a lack of efficacy of vitamin D in antineoplastic process.
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Affiliation(s)
- Pei-Shan Hu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China.,Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, 510060, Guangzhou, People's Republic of China
| | - Ting Li
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Jin-Fei Lin
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Miao-Zhen Qiu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - De-Shen Wang
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Ze-Xian Liu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Zhan-Hong Chen
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China.,Department of Medical Oncology and Guangdong Key Laboratory of Liver Disease, the Third Affiliated Hospital of Sun Yat-sen University, 510060, Guangzhou, People's Republic of China
| | - Lu-Ping Yang
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Xiao-Long Zhang
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Qi Zhao
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Yan-Xing Chen
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Yun-Xin Lu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Qi-Nian Wu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Heng-Ying Pu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Zhao-Lei Zeng
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Dan Xie
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China
| | - Huai-Qiang Ju
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China.,Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, 510060, Guangzhou, People's Republic of China
| | - Hui-Yan Luo
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China. .,Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, 510060, Guangzhou, People's Republic of China.
| | - Rui-Hua Xu
- Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, 510060, Guangzhou, People's Republic of China. .,Precision Diagnosis and Treatment for Gastrointestinal Cancer, Chinese Academy of Medical Sciences, 510060, Guangzhou, People's Republic of China.
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108
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Takahara T, Amemiya Y, Sugiyama R, Maki M, Shibata H. Amino acid-dependent control of mTORC1 signaling: a variety of regulatory modes. J Biomed Sci 2020; 27:87. [PMID: 32799865 PMCID: PMC7429791 DOI: 10.1186/s12929-020-00679-2] [Citation(s) in RCA: 130] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/30/2020] [Indexed: 01/10/2023] Open
Abstract
The mechanistic target of rapamycin complex 1 (mTORC1) is an essential regulator of cell growth and metabolism through the modulation of protein and lipid synthesis, lysosome biogenesis, and autophagy. The activity of mTORC1 is dynamically regulated by several environmental cues, including amino acid availability, growth factors, energy levels, and stresses, to coordinate cellular status with environmental conditions. Dysregulation of mTORC1 activity is closely associated with various diseases, including diabetes, cancer, and neurodegenerative disorders. The discovery of Rag GTPases has greatly expanded our understanding of the regulation of mTORC1 activity by amino acids, especially leucine and arginine. In addition to Rag GTPases, other factors that also contribute to the modulation of mTORC1 activity have been identified. In this review, we discuss the mechanisms of regulation of mTORC1 activity by particular amino acids.
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Affiliation(s)
- Terunao Takahara
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan.
| | - Yuna Amemiya
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
| | - Risa Sugiyama
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
| | - Masatoshi Maki
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
| | - Hideki Shibata
- Department of Applied Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
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109
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Osei-Bordom D, Bozward AG, Oo YH. The hepatic microenvironment and regulatory T cells. Cell Immunol 2020; 357:104195. [PMID: 32861844 DOI: 10.1016/j.cellimm.2020.104195] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 08/11/2020] [Accepted: 08/11/2020] [Indexed: 12/16/2022]
Abstract
The human liver is regarded as a lymphoid organ that contributes to both local and systemic immune response. Intrahepatic immune cells including regulatory T cells (Tregs) reside in the hepatic microenvironment which is enriched with proinflammatory cytokines, chemokines and metabolites. In addition, the hepatic microenvironment has the unique ability to establish and maintain immune tolerance despite the continuous influx of the gut derived microbial products via the portal vein. Regulatory T cells play a crucial role in maintaining the hepatic tolerogenic state; however, the phenotypic stability, function and survival of Tregs in the inflamed liver microenvironment is still poorly understood. Despite this, Tregs immunotherapy remains as an appealing therapeutic option in autoimmune and immune mediated liver diseases. In order to advance cell therapy, it is important for us to further our understanding of the hepatic microenvironment, with the aim of developing ways to modify the hostile, inflamed environment to one which is more favourable. By doing so, T cell stability and function would be enhanced, resulting in improved clinical outcomes.
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Affiliation(s)
- Daniel Osei-Bordom
- Centre for Liver Research and NIHR BRC, Institute of Immunology and Immunotherapy, University of Birmingham, United Kingdom; European Reference Network Centre: Rare Liver, United Kingdom; Queen Elizabeth Hospital, University Hospital of Birmingham NHS Foundation Trust, United Kingdom
| | - Amber G Bozward
- Centre for Liver Research and NIHR BRC, Institute of Immunology and Immunotherapy, University of Birmingham, United Kingdom; European Reference Network Centre: Rare Liver, United Kingdom
| | - Ye Htun Oo
- Centre for Liver Research and NIHR BRC, Institute of Immunology and Immunotherapy, University of Birmingham, United Kingdom; European Reference Network Centre: Rare Liver, United Kingdom; Queen Elizabeth Hospital, University Hospital of Birmingham NHS Foundation Trust, United Kingdom.
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110
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Yao J, Czaplinska D, Ialchina R, Schnipper J, Liu B, Sandelin A, Pedersen SF. Cancer Cell Acid Adaptation Gene Expression Response Is Correlated to Tumor-Specific Tissue Expression Profiles and Patient Survival. Cancers (Basel) 2020; 12:cancers12082183. [PMID: 32764426 PMCID: PMC7463722 DOI: 10.3390/cancers12082183] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/21/2020] [Accepted: 07/31/2020] [Indexed: 12/13/2022] Open
Abstract
The acidic pH of the tumor microenvironment plays a critical role in driving cancer development toward a more aggressive phenotype, but the underlying mechanisms are unclear. To this end, phenotypic and genotypic changes induced by adaptation of cancer cells to chronic acidosis have been studied. However, the generality of acid adaptation patterns across cell models and their correlation to the molecular phenotypes and aggressiveness of human cancers are essentially unknown. Here, we define an acid adaptation expression response shared across three cancer cell models, dominated by metabolic rewiring, extracellular matrix remodeling, and altered cell cycle regulation and DNA damage response. We find that many genes which are upregulated by acid adaptation are significantly correlated to patient survival, and more generally, that there are clear correlations between acid adaptation expression response and gene expression change between normal and tumor tissues, for a large subset of cancer patients. Our data support the notion that tumor microenvironment acidity is one of the key factors driving the selection of aggressive cancer cells in human patient tumors, yet it also induces a growth-limiting genotype that likely limits cancer cell growth until the cells are released from acidosis, for instance during invasion.
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Affiliation(s)
- Jiayi Yao
- The Bioinformatics Centre, Department of Biology, University of Copenhagen, DK2200 Copenhagen, Denmark;
- Biotech Research and Innovation Centre, University of Copenhagen, DK2200 Copenhagen, Denmark
| | - Dominika Czaplinska
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, DK2100 Copenhagen, Denmark; (D.C.); (R.I.); (J.S.)
| | - Renata Ialchina
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, DK2100 Copenhagen, Denmark; (D.C.); (R.I.); (J.S.)
| | - Julie Schnipper
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, DK2100 Copenhagen, Denmark; (D.C.); (R.I.); (J.S.)
| | - Bin Liu
- Cell Death and Metabolism, Center for Autophagy, Recycling and Disease, Danish Cancer Society Research Center, DK2100 Copenhagen, Denmark;
| | - Albin Sandelin
- The Bioinformatics Centre, Department of Biology, University of Copenhagen, DK2200 Copenhagen, Denmark;
- Biotech Research and Innovation Centre, University of Copenhagen, DK2200 Copenhagen, Denmark
- Correspondence: (A.S.); (S.F.P.)
| | - Stine Falsig Pedersen
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, DK2100 Copenhagen, Denmark; (D.C.); (R.I.); (J.S.)
- Correspondence: (A.S.); (S.F.P.)
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111
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O'Connell EJ, Martinez CA, Liang YG, Cistulli PA, Cook KM. Out of breath, out of time: interactions between HIF and circadian rhythms. Am J Physiol Cell Physiol 2020; 319:C533-C540. [PMID: 32726159 DOI: 10.1152/ajpcell.00305.2020] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Humans have internal circadian clocks that ensure that important physiological functions occur at specific times of the day. These molecular clocks are regulated at the genomic level and exist in most cells of the body. Multiple circadian resetting cues have been identified, including light, temperature, and food. Recently, oxygen has been identified as a resetting cue, and emerging science indicates that this occurs through interactions at the cellular level between the circadian transcription-translation feedback loop and the hypoxia-inducible pathway (hypoxia-inducible factor; subject of the 2019 Nobel Prize in Physiology or Medicine). This review will cover recently identified relationships between HIF and proteins of the circadian clock. Interactions between the circadian clock and hypoxia could have wide-reaching implications for human diseases, and understanding the molecular mechanisms regulating these overlapping pathways may open up new strategies for drug discovery.
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Affiliation(s)
- Emma J O'Connell
- University of Sydney, Faculty of Medicine and Health and Charles Perkins Centre, Camperdown, New South Wales, Australia
| | - Chloe-Anne Martinez
- University of Sydney, Faculty of Medicine and Health and Charles Perkins Centre, Camperdown, New South Wales, Australia
| | - Yichuan G Liang
- University of Sydney, Faculty of Medicine and Health and Charles Perkins Centre, Camperdown, New South Wales, Australia
| | - Peter A Cistulli
- University of Sydney, Faculty of Medicine and Health and Charles Perkins Centre, Camperdown, New South Wales, Australia
| | - Kristina M Cook
- University of Sydney, Faculty of Medicine and Health and Charles Perkins Centre, Camperdown, New South Wales, Australia
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112
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Shen H, Cook K, Gee HE, Hau E. Hypoxia, metabolism, and the circadian clock: new links to overcome radiation resistance in high-grade gliomas. J Exp Clin Cancer Res 2020; 39:129. [PMID: 32631383 PMCID: PMC7339573 DOI: 10.1186/s13046-020-01639-2] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 07/01/2020] [Indexed: 02/07/2023] Open
Abstract
Radiotherapy is the cornerstone of treatment of high-grade gliomas (HGGs). It eradicates tumor cells by inducing oxidative stress and subsequent DNA damage. Unfortunately, almost all HGGs recur locally within several months secondary to radioresistance with intricate molecular mechanisms. Therefore, unravelling specific underlying mechanisms of radioresistance is critical to elucidating novel strategies to improve the radiosensitivity of tumor cells, and enhance the efficacy of radiotherapy. This review addresses our current understanding of how hypoxia and the hypoxia-inducible factor 1 (HIF-1) signaling pathway have a profound impact on the response of HGGs to radiotherapy. In addition, intriguing links between hypoxic signaling, circadian rhythms and cell metabolism have been recently discovered, which may provide insights into our fundamental understanding of radioresistance. Cellular pathways involved in the hypoxic response, DNA repair and metabolism can fluctuate over 24-h periods due to circadian regulation. These oscillatory patterns may have consequences for tumor radioresistance. Timing radiotherapy for specific times of the day (chronoradiotherapy) could be beneficial in patients with HGGs and will be discussed.
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Affiliation(s)
- Han Shen
- Translational Radiation Biology and Oncology Laboratory, Centre for Cancer Research, Westmead Institute for Medical Research, Westmead, New South Wales, 2145, Australia.
- Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia.
| | - Kristina Cook
- Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
- Faculty of Medicine and Health & Charles Perkins Centre, University of Sydney, Camperdown, New South Wales, Australia
| | - Harriet E Gee
- Translational Radiation Biology and Oncology Laboratory, Centre for Cancer Research, Westmead Institute for Medical Research, Westmead, New South Wales, 2145, Australia
- Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
- Department of Radiation Oncology, Crown Princess Mary Cancer Centre, Westmead Hospital, Westmead, New South Wales, Australia
| | - Eric Hau
- Translational Radiation Biology and Oncology Laboratory, Centre for Cancer Research, Westmead Institute for Medical Research, Westmead, New South Wales, 2145, Australia
- Sydney Medical School, University of Sydney, Camperdown, New South Wales, Australia
- Department of Radiation Oncology, Crown Princess Mary Cancer Centre, Westmead Hospital, Westmead, New South Wales, Australia
- Blacktown Hematology and Cancer Centre, Blacktown Hospital, Blacktown, New South Wales, Australia
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113
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Zhao Q, Gao SM, Wang MC. Molecular Mechanisms of Lysosome and Nucleus Communication. Trends Biochem Sci 2020; 45:978-991. [PMID: 32624271 DOI: 10.1016/j.tibs.2020.06.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 05/11/2020] [Accepted: 06/04/2020] [Indexed: 12/14/2022]
Abstract
Lysosomes transcend the role of degradation stations, acting as key nodes for interorganelle crosstalk and signal transduction. Lysosomes communicate with the nucleus through physical proximity and functional interaction. In response to external and internal stimuli, lysosomes actively adjust their distribution between peripheral and perinuclear regions and modulate lysosome-nucleus signaling pathways; in turn, the nucleus fine-tunes lysosomal biogenesis and functions through transcriptional controls. Changes in coordination between these two essential organelles are associated with metabolic disorders, neurodegenerative diseases, and aging. In this review, we address recent advances in lysosome-nucleus communication by multi-tiered regulatory mechanisms and discuss how these regulations couple metabolic inputs with organellar motility, cellular signaling, and transcriptional network.
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Affiliation(s)
- Qian Zhao
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
| | - Shihong Max Gao
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA; Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA
| | - Meng C Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; Program in Developmental Biology, Baylor College of Medicine, Houston, TX 77030, USA; Huffington Center on Aging, Baylor College of Medicine, Houston, TX 77030, USA; Howard Hughes Medical Institute, Baylor College of Medicine, Houston, TX 77030, USA.
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114
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Peek CB. Metabolic Implications of Circadian-HIF Crosstalk. Trends Endocrinol Metab 2020; 31:459-468. [PMID: 32396846 DOI: 10.1016/j.tem.2020.02.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 02/11/2020] [Accepted: 02/21/2020] [Indexed: 12/16/2022]
Abstract
Research over the past few decades has shed light on the mechanisms underlying the link between circadian disruption and the development of metabolic diseases such as obesity, type 2 diabetes, and cancer. However, how the clock network interacts with tissue-specificnutrient-sensing pathways during conditions of nutrient stress or pathological states remains incompletely understood. Recent work has demonstrated that the circadian clock can 'reprogram' the transcriptome to control distinct sets of genes during altered nutrient conditions, such as high fat diet, aging, and exercise. In this review, I discuss connections between circadian clock transcription factors and the oxygen- and nutrient-responsivehypoxia-inducible factor (HIF) pathway. I highlight recently uncovered mechanistic insights underlying these pathway interactions and address potential implications for the role of circadian disruption in metabolic diseases.
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Affiliation(s)
- Clara B Peek
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Chicago, IL 60611, USA; Division of Endocrinology, Metabolism and Molecular Medicine, Feinberg School of Medicine, Chicago, IL 60611, USA.
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115
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Abstract
A complex molecular machinery converges on the surface of lysosomes to ensure that the growth-promoting signaling mediated by mechanistic target of rapamycin complex 1 (mTORC1) is tightly controlled by the availability of nutrients and growth factors. The final step in this activation process is dependent on Rheb, a small GTPase that binds to mTOR and allosterically activates its kinase activity. Here we review the mechanisms that determine the subcellular localization of Rheb (and the closely related RhebL1 protein) as well as the significance of these mechanisms for controlling mTORC1 activation. In particular, we explore how the relatively weak membrane interactions conferred by C-terminal farnesylation are critical for the ability of Rheb to activate mTORC1. In addition to supporting transient membrane interactions, Rheb C-terminal farnesylation also supports an interaction between Rheb and the δ subunit of phosphodiesterase 6 (PDEδ). This interaction provides a potential mechanism for targeting Rheb to membranes that contain Arl2, a small GTPase that triggers the release of prenylated proteins from PDEδ. The minimal membrane targeting conferred by C-terminal farnesylation of Rheb and RhebL1 distinguishes them from other members of the Ras superfamily that possess additional membrane interaction motifs that work with farnesylation for enrichment on the specific subcellular membranes where they engage key effectors. Finally, we highlight diversity in Rheb membrane targeting mechanisms as well as the potential for alternative mTORC1 activation mechanisms across species.
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Affiliation(s)
- Brittany Angarola
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT, 06510, USA.,Department of Neuroscience, Program in Cellular Neuroscience, Neurodegeneration, and Repair, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Shawn M Ferguson
- Department of Cell Biology, Yale University School of Medicine, New Haven, CT, 06510, USA.,Department of Neuroscience, Program in Cellular Neuroscience, Neurodegeneration, and Repair, Yale University School of Medicine, New Haven, CT, 06510, USA
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116
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Huang H, Long L, Zhou P, Chapman NM, Chi H. mTOR signaling at the crossroads of environmental signals and T-cell fate decisions. Immunol Rev 2020; 295:15-38. [PMID: 32212344 PMCID: PMC8101438 DOI: 10.1111/imr.12845] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/19/2020] [Indexed: 12/28/2022]
Abstract
The evolutionarily conserved serine/threonine kinase mTOR (mechanistic target of rapamycin) forms the distinct protein complexes mTORC1 and mTORC2 and integrates signals from the environment to coordinate downstream signaling events and various cellular processes. T cells rely on mTOR activity for their development and to establish their homeostasis and functional fitness. Here, we review recent progress in our understanding of the upstream signaling and downstream targets of mTOR. We also provide an updated overview of the roles of mTOR in T-cell development, homeostasis, activation, and effector-cell fate decisions, as well as its important impacts on the suppressive activity of regulatory T cells. Moreover, we summarize the emerging roles of mTOR in T-cell exhaustion and transdifferentiation. A better understanding of the contribution of mTOR to T-cell fate decisions will ultimately aid in the therapeutic targeting of mTOR in human disease.
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Affiliation(s)
- Hongling Huang
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Lingyun Long
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
- Equal contribution
| | - Peipei Zhou
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
- Equal contribution
| | - Nicole M. Chapman
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Hongbo Chi
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
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117
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Lee P, Chandel NS, Simon MC. Cellular adaptation to hypoxia through hypoxia inducible factors and beyond. Nat Rev Mol Cell Biol 2020; 21:268-283. [PMID: 32144406 PMCID: PMC7222024 DOI: 10.1038/s41580-020-0227-y] [Citation(s) in RCA: 606] [Impact Index Per Article: 151.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2020] [Indexed: 02/06/2023]
Abstract
Molecular oxygen (O2) sustains intracellular bioenergetics and is consumed by numerous biochemical reactions, making it essential for most species on Earth. Accordingly, decreased oxygen concentration (hypoxia) is a major stressor that generally subverts life of aerobic species and is a prominent feature of pathological states encountered in bacterial infection, inflammation, wounds, cardiovascular defects and cancer. Therefore, key adaptive mechanisms to cope with hypoxia have evolved in mammals. Systemically, these adaptations include increased ventilation, cardiac output, blood vessel growth and circulating red blood cell numbers. On a cellular level, ATP-consuming reactions are suppressed, and metabolism is altered until oxygen homeostasis is restored. A critical question is how mammalian cells sense oxygen levels to coordinate diverse biological outputs during hypoxia. The best-studied mechanism of response to hypoxia involves hypoxia inducible factors (HIFs), which are stabilized by low oxygen availability and control the expression of a multitude of genes, including those involved in cell survival, angiogenesis, glycolysis and invasion/metastasis. Importantly, changes in oxygen can also be sensed via other stress pathways as well as changes in metabolite levels and the generation of reactive oxygen species by mitochondria. Collectively, this leads to cellular adaptations of protein synthesis, energy metabolism, mitochondrial respiration, lipid and carbon metabolism as well as nutrient acquisition. These mechanisms are integral inputs into fine-tuning the responses to hypoxic stress.
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Affiliation(s)
- Pearl Lee
- Abramson Family Cancer Research Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
| | - Navdeep S Chandel
- Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
- Department of Biochemistry and Molecular Genetics, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
| | - M Celeste Simon
- Abramson Family Cancer Research Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
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118
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Kwon YJ, Seo EB, Kwon SH, Lee SH, Kim SK, Park SK, Kim K, Park S, Park IC, Park JW, Ye SK. Extracellular Acidosis Promotes Metastatic Potency via Decrease of the BMAL1 Circadian Clock Gene in Breast Cancer. Cells 2020; 9:E989. [PMID: 32316196 PMCID: PMC7226966 DOI: 10.3390/cells9040989] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/13/2020] [Accepted: 04/14/2020] [Indexed: 12/11/2022] Open
Abstract
Circadian oscillation is an essential process that influences many physiological and biological mechanisms and a decrease of circadian genes is associated with many diseases such as cancer. Despite many efforts to identify the detailed mechanism for decreasing circadian genes and recovering reduced circadian genes in cancer, it is still largely unknown. We found that BMAL1 was reduced in tumor hypoxia-induced acidosis, and recovered by selectively targeting acidic pH in breast cancer cell lines. Surprisingly, BMAL1 was reduced by decrease of protein stability as well as inhibition of transcription under acidosis. In addition, melatonin significantly prevented acidosis-mediated decrease of BMAL1 by inhibiting lactate dehydrogenase-A during hypoxia. Remarkably, acidosis-mediated metastasis was significantly alleviated by BMAL1 overexpression in breast cancer cells. We therefore suggest that tumor hypoxia-induced acidosis promotes metastatic potency by decreasing BMAL1, and that tumor acidosis could be a target for preventing breast cancer metastasis by sustaining BMAL1.
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Affiliation(s)
- Yong-Jin Kwon
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
| | - Eun-Bi Seo
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
| | - Sun-Ho Kwon
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
| | - Song-Hee Lee
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
| | - Seul-Ki Kim
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
| | - Sang Ki Park
- Department of Life Sciences, Pohang University of Science and Technology, Pohang 37673, Korea;
| | - Kyungjin Kim
- Department of Brain and Cognitive Sciences, Daegu Gyeongbuk Institute of Science and Technology, Daegu 42988, Korea;
| | - SaeGwang Park
- Department of Microbiology and Immunology, INJE University College of Medicine, 633-165 GaegumDong, Busanjin Gu, Busan 614-735, Korea;
| | - In-Chul Park
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, Nowon-gu, Seoul 01812, Korea;
| | - Jong-Wan Park
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Korea
| | - Sang-Kyu Ye
- Department of Pharmacology and Biomedical Sciences, Seoul National University College of Medicine, Seoul 03080, Korea; (Y.-J.K.); (E.-B.S.); (S.-H.K.); (S.-H.L.); (S.-K.K.); (J.-W.P.)
- Biomedical Science Project (BK21PLUS), Seoul National University College of Medicine, Seoul 03080, Korea
- Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Seoul 03080, Korea
- Neuro-Immune Information Storage Network Research Center, Seoul National University College of Medicine, Seoul 03080, Korea
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119
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Analysis of the Circadian Regulation of Cancer Hallmarks by a Cross-Platform Study of Colorectal Cancer Time-Series Data Reveals an Association with Genes Involved in Huntington's Disease. Cancers (Basel) 2020; 12:cancers12040963. [PMID: 32295075 PMCID: PMC7226183 DOI: 10.3390/cancers12040963] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/07/2020] [Accepted: 04/10/2020] [Indexed: 02/06/2023] Open
Abstract
Accumulating evidence points to a link between circadian clock dysfunction and the molecular events that drive tumorigenesis. Here, we investigated the connection between the circadian clock and the hallmarks of cancer in an in vitro model of colorectal cancer (CRC). We used a cross-platform data normalization method to concatenate and compare available microarray and RNA-sequencing time series data of CRC cell lines derived from the same patient at different disease stages. Our data analysis suggests differential regulation of molecular pathways between the CRC cells and identifies several of the circadian and likely clock-controlled genes (CCGs) as cancer hallmarks and circadian drug targets. Notably, we found links of the CCGs to Huntington’s disease (HD) in the metastasis-derived cells. We then investigated the impact of perturbations of our candidate genes in a cohort of 439 patients with colon adenocarcinoma retrieved from the Cancer Genome Atlas (TCGA). The analysis revealed a correlation of the differential expression levels of the candidate genes with the survival of patients. Thus, our study provides a bioinformatics workflow that allows for a comprehensive analysis of circadian properties at different stages of colorectal cancer, and identifies a new association between cancer and HD.
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120
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Zhou M, Xie Y, Xu S, Xin J, Wang J, Han T, Ting R, Zhang J, An F. Hypoxia-activated nanomedicines for effective cancer therapy. Eur J Med Chem 2020; 195:112274. [PMID: 32259703 DOI: 10.1016/j.ejmech.2020.112274] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 03/12/2020] [Accepted: 03/24/2020] [Indexed: 12/27/2022]
Abstract
Hypoxia, a common characteristic in solid tumors, is found in phenotypically aggressive cancers that display resistance to typical cancer interventions. Due to its important role in tumor progression, tumor hypoxia has been considered as a primary target for cancer diagnosis and treatment. An advantage of hypoxia-activated nanomedicines is that they are inactive in normoxic cells. In hypoxic tumor tissues and cells, these nanomedicines undergo reduction by activated enzymes (usually through 1 or 2 electron oxidoreductases) to produce cytotoxic substances. In this review, we will focus on approaches to design nanomedicines that take advantage of tumor hypoxia. These approaches include: i) inhibitors of hypoxia-associated signaling pathways; ii) prodrugs activated by hypoxia; iii) nanocarriers responsive to hypoxia, and iv) bacteria mediated hypoxia targeting therapy. These strategies have guided and will continue to guide nanoparticle design in the near future. These strategies have the potential to overcome tumor heterogeneity to improve the efficiency of radiotherapy, chemotherapy and diagnosis.
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Affiliation(s)
- Mengjiao Zhou
- Department of Pharmacology, School of Pharmacy, Nantong University, 226000, Nantong, Jiangsu, PR China
| | - Yuqi Xie
- Department of Pharmacology, School of Pharmacy, Nantong University, 226000, Nantong, Jiangsu, PR China
| | - Shujun Xu
- Department of Pharmacology, School of Pharmacy, Nantong University, 226000, Nantong, Jiangsu, PR China
| | - Jingqi Xin
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Health Science Center, Xi'an Jiaotong University, No.76 Yanta West Road, Xi'an, 710061, Shaanxi, PR China
| | - Jin Wang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, PR China
| | - Tao Han
- College of Chemistry and Life Science, Institute of Functional Molecules, Chengdu Normal University, Chengdu, 611130, PR China
| | - Richard Ting
- Department of Radiology, Weill Cornell Medicine, 413E, 69th St, New York, NY, 10065, USA
| | - Jie Zhang
- School of Pharmacy, Health Science Center, Xi'an Jiaotong University, No. 76 Yanta West Road, Xi'an, 710061, Shaanxi, PR China.
| | - Feifei An
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Science, Health Science Center, Xi'an Jiaotong University, No.76 Yanta West Road, Xi'an, 710061, Shaanxi, PR China.
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121
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Blaževitš O, Bolshette N, Vecchio D, Guijarro A, Croci O, Campaner S, Grimaldi B. MYC-Associated Factor MAX is a Regulator of the Circadian Clock. Int J Mol Sci 2020; 21:E2294. [PMID: 32225100 PMCID: PMC7177918 DOI: 10.3390/ijms21072294] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/17/2020] [Accepted: 03/24/2020] [Indexed: 12/12/2022] Open
Abstract
The circadian transcriptional network is based on a competition between transcriptional activator and repressor complexes regulating the rhythmic expression of clock-controlled genes. We show here that the MYC-associated factor X, MAX, plays a repressive role in this network and operates through a MYC-independent binding to E-box-containing regulatory regions within the promoters of circadian BMAL1 targets. We further show that this "clock" function of MAX is required for maintaining a proper circadian rhythm and that MAX and BMAL1 contribute to two temporally alternating transcriptional complexes on clock-regulated promoters. We also identified MAX network transcriptional repressor, MNT, as a fundamental partner of MAX-mediated circadian regulation. Collectively, our data indicate that MAX regulates clock gene expression and contributes to keeping the balance between positive and negative elements of the molecular clock machinery.
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Affiliation(s)
- Olga Blaževitš
- Molecular Medicine Research Line, Fondazione Istituto Italiano di Tecnologia (IIT), 16135 Genoa, Italy; (O.B.); (N.B.); (D.V.); (A.G.)
| | - Nityanand Bolshette
- Molecular Medicine Research Line, Fondazione Istituto Italiano di Tecnologia (IIT), 16135 Genoa, Italy; (O.B.); (N.B.); (D.V.); (A.G.)
| | - Donatella Vecchio
- Molecular Medicine Research Line, Fondazione Istituto Italiano di Tecnologia (IIT), 16135 Genoa, Italy; (O.B.); (N.B.); (D.V.); (A.G.)
| | - Ana Guijarro
- Molecular Medicine Research Line, Fondazione Istituto Italiano di Tecnologia (IIT), 16135 Genoa, Italy; (O.B.); (N.B.); (D.V.); (A.G.)
| | - Ottavio Croci
- Center for Genomic Science, Fondazione Istituto Italiano di Tecnologia (IIT), 20139 Milan, Italy; (O.C.); (S.C.)
| | - Stefano Campaner
- Center for Genomic Science, Fondazione Istituto Italiano di Tecnologia (IIT), 20139 Milan, Italy; (O.C.); (S.C.)
| | - Benedetto Grimaldi
- Molecular Medicine Research Line, Fondazione Istituto Italiano di Tecnologia (IIT), 16135 Genoa, Italy; (O.B.); (N.B.); (D.V.); (A.G.)
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122
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Mutvei AP, Nagiec MJ, Hamann JC, Kim SG, Vincent CT, Blenis J. Rap1-GTPases control mTORC1 activity by coordinating lysosome organization with amino acid availability. Nat Commun 2020; 11:1416. [PMID: 32184389 PMCID: PMC7078236 DOI: 10.1038/s41467-020-15156-5] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 02/17/2020] [Indexed: 02/08/2023] Open
Abstract
The kinase mTOR complex 1 (mTORC1) promotes cellular growth and is frequently dysregulated in cancers. In response to nutrients, mTORC1 is activated on lysosomes by Rag and Rheb guanosine triphosphatases (GTPases) and drives biosynthetic processes. How limitations in nutrients suppress mTORC1 activity remains poorly understood. We find that when amino acids are limited, the Rap1-GTPases confine lysosomes to the perinuclear region and reduce lysosome abundance, which suppresses mTORC1 signaling. Rap1 activation, which is independent of known amino acid signaling factors, limits the lysosomal surface available for mTORC1 activation. Conversely, Rap1 depletion expands the lysosome population, which markedly increases association between mTORC1 and its lysosome-borne activators, leading to mTORC1 hyperactivity. Taken together, we establish Rap1 as a critical coordinator of the lysosomal system, and propose that aberrant changes in lysosomal surface availability can impact mTORC1 signaling output.
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Affiliation(s)
- Anders P Mutvei
- Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, Belfer Research Building, 413 E. 69th St., New York, NY, 10021, USA.
- Karolinska Institutet, Department of Microbiology, Tumor and Cell biology, Nobels väg 16, KI Solna Campus Karolinska Institutet, Box 280, SE-171 77, Stockholm, Sweden.
- Department of Immunology, Genetics and Pathology, Uppsala University, Rudbeck Laboratory, 751 85, Uppsala, Sweden.
| | - Michal J Nagiec
- Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, Belfer Research Building, 413 E. 69th St., New York, NY, 10021, USA
| | - Jens C Hamann
- Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, Belfer Research Building, 413 E. 69th St., New York, NY, 10021, USA
| | - Sang Gyun Kim
- Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, Belfer Research Building, 413 E. 69th St., New York, NY, 10021, USA
| | - C Theresa Vincent
- Department of Immunology, Genetics and Pathology, Uppsala University, Rudbeck Laboratory, 751 85, Uppsala, Sweden
- Department of Microbiology, New York University School of Medicine, New York, NY, USA
| | - John Blenis
- Weill Cornell Medicine, Sandra and Edward Meyer Cancer Center, Belfer Research Building, 413 E. 69th St., New York, NY, 10021, USA.
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123
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Siska PJ, Singer K, Evert K, Renner K, Kreutz M. The immunological Warburg effect: Can a metabolic-tumor-stroma score (MeTS) guide cancer immunotherapy? Immunol Rev 2020; 295:187-202. [PMID: 32157706 DOI: 10.1111/imr.12846] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 02/20/2020] [Accepted: 02/24/2020] [Indexed: 12/14/2022]
Abstract
The "glycolytic switch" also known as the "Warburg effect" is a key feature of tumor cells and leads to the accumulation of lactate and protons in the tumor environment. Intriguingly, non-malignant lymphocytes or stromal cells such as tumor-associated macrophages and cancer-associated fibroblasts contribute to the lactate accumulation in the tumor environment, a phenomenon described as the "Reverse Warburg effect." Localized lactic acidosis has a strong immunosuppressive effect and mediates an immune escape of tumors. However, some tumors do not display the Warburg phenotype and either rely on respiration or appear as a mosaic of cells with different metabolic properties. Based on these findings and on the knowledge that T cell infiltration is predictive for patient outcome, we suggest a metabolic-tumor-stroma score to determine the likelihood of a successful anti-tumor immune response: (a) a respiring tumor with high T cell infiltration ("hot"); (b) a reverse Warburg type with respiring tumor cells but glycolytic stromal cells; (c) a mixed type with glycolytic and respiring compartments; and (d) a glycolytic (Warburg) tumor with low T cell infiltration ("cold"). Here, we provide evidence that these types can be independent of the organ of origin, prognostically relevant and might help select the appropriate immunotherapy approach.
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Affiliation(s)
- Peter J Siska
- Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Katrin Singer
- Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Katja Evert
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Kathrin Renner
- Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology (RCI), Regensburg, Germany
| | - Marina Kreutz
- Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology (RCI), Regensburg, Germany
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124
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Morris AR, Stanton DL, Roman D, Liu AC. Systems Level Understanding of Circadian Integration with Cell Physiology. J Mol Biol 2020; 432:3547-3564. [PMID: 32061938 DOI: 10.1016/j.jmb.2020.02.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 01/31/2020] [Accepted: 02/03/2020] [Indexed: 02/07/2023]
Abstract
The mammalian circadian clock regulates a wide variety of physiological and behavioral processes. In turn, its disruption is associated with sleep deficiency, metabolic syndrome, neurological and psychiatric disorders, and cancer. At the turn of the century, the circadian clock was determined to be regulated by a transcriptional negative feedback mechanism composed of a dozen core clock genes. More recently, large-scale genomic studies have expanded the clock into a complex network composed of thousands of gene outputs and inputs. A major task of circadian research is to utilize systems biological approaches to uncover the governing principles underlying cellular oscillatory behavior and advance understanding of biological functions at the genomic level with spatiotemporal resolution. This review focuses on the genes and pathways that provide inputs to the circadian clock. Several emerging examples include AMP-activated protein kinase AMPK, nutrient/energy sensor mTOR, NAD+-dependent deacetylase SIRT1, hypoxia-inducible factor HIF1α, oxidative stress-inducible factor NRF2, and the proinflammatory factor NF-κB. Among others that continue to be revealed, these input pathways reflect the extensive interplay between the clock and cell physiology through the regulation of core clock genes and proteins. While the scope of this crosstalk is well-recognized, precise molecular links are scarce, and the underlying regulatory mechanisms are not well understood. Future research must leverage genetic and genomic tools and technologies, network analysis, and computational modeling to characterize additional modifiers and input pathways. This systems-based framework promises to advance understanding of the circadian timekeeping system and may enable the enhancement of circadian functions through related input pathways.
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Affiliation(s)
- Andrew R Morris
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, FL, United States of America
| | - Daniel L Stanton
- Department of Animal Sciences, University of Florida Institute of Food and Agricultural Sciences, Gainesville, FL, United States of America
| | - Destino Roman
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, FL, United States of America
| | - Andrew C Liu
- Department of Physiology and Functional Genomics, University of Florida College of Medicine, Gainesville, FL, United States of America.
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125
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Liu Y, Zhang Y, Li T, Han J, Wang Y. The tight junction protein TJP1 regulates the feeding-modulated hepatic circadian clock. Nat Commun 2020; 11:589. [PMID: 32001717 PMCID: PMC6992704 DOI: 10.1038/s41467-020-14470-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/10/2020] [Indexed: 01/05/2023] Open
Abstract
Circadian clocks in the suprachiasmatic nucleus and peripheral tissues orchestrate behavioral and physiological activities of mammals in response to environmental cues. In the liver, the circadian clock is also modulated by feeding. However, the molecular mechanisms involved are unclear. Here, we show that TJP1 (tight junction protein 1) functions as a mediator of mTOR (mechanistic target of rapamycin) to modulate the hepatic circadian clock. TJP1 interacts with PER1 (period circadian regulator 1) and prevents its nuclear translocation. During feeding, mTOR phosphorylates TJP1 and attenuates its association with PER1, thereby enhancing nuclear shuttling of PER1 to dampen circadian oscillation. Therefore, our results provide a previously uncharacterized mechanistic insight into how feeding modulates the hepatic circadian clock. The circadian clock regulates rhythms of physiology and metabolism in response to environmental cues such as food intake. Here, the authors show that tight junction protein 1 (TJP1) interacts with period 1 and modulates its nuclear translocation in a mTOR-dependent manner.
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Affiliation(s)
- Yi Liu
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yuanyuan Zhang
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Tong Li
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Jinbo Han
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yiguo Wang
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
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126
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Sinturel F, Petrenko V, Dibner C. Circadian Clocks Make Metabolism Run. J Mol Biol 2020; 432:3680-3699. [PMID: 31996313 DOI: 10.1016/j.jmb.2020.01.018] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/16/2020] [Accepted: 01/16/2020] [Indexed: 12/12/2022]
Abstract
Most organisms adapt to the 24-h cycle of the Earth's rotation by anticipating the time of the day through light-dark cycles. The internal time-keeping system of the circadian clocks has been developed to ensure this anticipation. The circadian system governs the rhythmicity of nearly all physiological and behavioral processes in mammals. In this review, we summarize current knowledge stemming from rodent and human studies on the tight interconnection between the circadian system and metabolism in the body. In particular, we highlight recent advances emphasizing the roles of the peripheral clocks located in the metabolic organs in regulating glucose, lipid, and protein homeostasis at the organismal and cellular levels. Experimental disruption of circadian system in rodents is associated with various metabolic disturbance phenotypes. Similarly, perturbation of the clockwork in humans is linked to the development of metabolic diseases. We discuss recent studies that reveal roles of the circadian system in the temporal coordination of metabolism under physiological conditions and in the development of human pathologies.
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Affiliation(s)
- Flore Sinturel
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, Geneva, 14, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland.
| | - Volodymyr Petrenko
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, Geneva, 14, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland
| | - Charna Dibner
- Department of Medicine, Division of Endocrinology, Diabetes, Hypertension and Nutrition, Faculty of Medicine, University of Geneva, Rue Michel-Servet, 1, CH-1211, Geneva, 14, Switzerland; Department of Cell Physiology and Metabolism, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Institute of Genetics and Genomics of Geneva (iGE3), University of Geneva, Geneva, Switzerland.
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127
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García-Costela M, Escudero-Feliú J, Puentes-Pardo JD, San Juán SM, Morales-Santana S, Ríos-Arrabal S, Carazo Á, León J. Circadian Genes as Therapeutic Targets in Pancreatic Cancer. Front Endocrinol (Lausanne) 2020; 11:638. [PMID: 33042011 PMCID: PMC7516350 DOI: 10.3389/fendo.2020.00638] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 08/06/2020] [Indexed: 12/24/2022] Open
Abstract
Pancreatic cancer is one of the most lethal cancers worldwide due to its symptoms, early metastasis, and chemoresistance. Thus, the mechanisms contributing to pancreatic cancer progression require further exploration. Circadian rhythms are the daily oscillations of multiple biological processes regulated by an endogenous clock. Several evidences suggest that the circadian clock may play an important role in the cell cycle, cell proliferation and apoptosis. In addition, timing of chemotherapy or radiation treatment can influence the efficacy and toxicity treatment. Here, we revisit the studies on circadian clock as an emerging target for therapy in pancreatic cancer. We highlight those potential circadian genes regulators that are commonly affected in pancreatic cancer according to most recent reports.
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Affiliation(s)
- María García-Costela
- Research Unit, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
| | - Julia Escudero-Feliú
- Research Unit, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
| | - Jose D. Puentes-Pardo
- Research Unit, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
- Jose D. Puentes-Pardo
| | - Sara Moreno San Juán
- Cytometry and Michroscopy Research Service, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
| | - Sonia Morales-Santana
- Proteomic Research Service, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
- Endocrinology Unit, Endocrinology Division, CIBER of Fragility and Healthy Aging (CIBERFES), San Cecilio University Hospital, Granada, Spain
| | - Sandra Ríos-Arrabal
- Research Unit, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
- *Correspondence: Sandra Ríos-Arrabal
| | - Ángel Carazo
- Genomic Research Service, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
| | - Josefa León
- Research Unit, Biosanitary Research Institute of Granada, ibs.GRANADA, Granada, Spain
- Clinical Management Unit of Digestive Disease, San Cecilio University Hospital, Granada, Spain
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128
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Kulkarni A, Dong A, Kulkarni VV, Chen J, Laxton O, Anand A, Maday S. Differential regulation of autophagy during metabolic stress in astrocytes and neurons. Autophagy 2019; 16:1651-1667. [PMID: 31876243 DOI: 10.1080/15548627.2019.1703354] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Macroautophagy/autophagy is a key homeostatic process that targets cytoplasmic components to the lysosome for breakdown and recycling. Autophagy plays critical roles in glia and neurons that affect development, functionality, and viability of the nervous system. The mechanisms that regulate autophagy in glia and neurons, however, are poorly understood. Here, we define the molecular underpinnings of autophagy in primary cortical astrocytes in response to metabolic stress, and perform a comparative study in primary hippocampal neurons. We find that inducing metabolic stress by nutrient deprivation or pharmacological inhibition of MTOR (mechanistic target of rapamycin kinase) robustly activates autophagy in astrocytes. While both paradigms of metabolic stress dampen MTOR signaling, they affect the autophagy pathway differently. Further, we find that starvation-induced autophagic flux is dependent on the buffering system of the starvation solution. Lastly, starvation conditions that strongly activate autophagy in astrocytes have less pronounced effects on autophagy in neurons. Combined, our study reveals the complexity of regulating autophagy in different paradigms of metabolic stress, as well as in different cell types of the brain. Our findings raise important implications for how neurons and glia may collaborate to maintain homeostasis in the brain. ABBREVIATIONS ACSF: artificial cerebrospinal fluid; baf A1: bafilomycin A1; EBSS: earle's balanced salt solution; GFAP: glial fibrillary acidic protein; Glc: glucose; GM: glial media; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; MTOR: mechanistic target of rapamycin kinase; p-RPS6: phospho-RPS6; p-ULK1: phospho-ULK1; RPS6: ribosomal protein S6; SQSTM1/p62: sequestosome 1; ULK1: unc-51-like kinase 1.
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Affiliation(s)
- Aditi Kulkarni
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Audrey Dong
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Vineet Vinay Kulkarni
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Jessica Chen
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Olivia Laxton
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Anip Anand
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
| | - Sandra Maday
- Department of Neuroscience, Perelman School of Medicine at the University of Pennsylvania , Philadelphia, PA 19104, USA
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129
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Abstract
Circadian clocks are endogenous oscillators that control 24-h physiological and behavioral processes. The central circadian clock exerts control over myriad aspects of mammalian physiology, including the regulation of sleep, metabolism, and the immune system. Here, we review advances in understanding the genetic regulation of sleep through the circadian system, as well as the impact of dysregulated gene expression on metabolic function. We also review recent studies that have begun to unravel the circadian clock’s role in controlling the cardiovascular and nervous systems, gut microbiota, cancer, and aging. Such circadian control of these systems relies, in part, on transcriptional regulation, with recent evidence for genome-wide regulation of the clock through circadian chromosome organization. These novel insights into the genomic regulation of human physiology provide opportunities for the discovery of improved treatment strategies and new understanding of the biological underpinnings of human disease.
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130
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Abstract
Circadian clocks usually run with a period close to 24 h, but are also plastic and can be entrained by external environmental conditions and internal physiological cues. Two key nutrient metabolites, glucose and vitamin B3 (nicotinamide), can influence the circadian period in both mammals and plants; however, the underlying molecular mechanism is still largely unclear. We reveal that the target of rapamycin (TOR) kinase, a conserved central growth regulator, is essential for glucose- and nicotinamide-mediated control of the circadian period in Arabidopsis. Nicotinamide affects the cytosolic adenosine triphosphate concentration, and blocks the effect of glucose-TOR energy signaling on period length adjustment, meristem activation, and root growth. Together, our results uncover a missing link between cellular metabolites, energy status, and circadian period adjustment, and identify TOR kinase as an essential energy sensor to coordinate circadian clock and plant growth.
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131
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Lysosomes as dynamic regulators of cell and organismal homeostasis. Nat Rev Mol Cell Biol 2019; 21:101-118. [DOI: 10.1038/s41580-019-0185-4] [Citation(s) in RCA: 408] [Impact Index Per Article: 81.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2019] [Indexed: 12/11/2022]
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132
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Astaburuaga R, Quintanar Haro OD, Stauber T, Relógio A. A Mathematical Model of Lysosomal Ion Homeostasis Points to Differential Effects of Cl - Transport in Ca 2+ Dynamics. Cells 2019; 8:E1263. [PMID: 31623161 PMCID: PMC6848924 DOI: 10.3390/cells8101263] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 10/11/2019] [Accepted: 10/13/2019] [Indexed: 12/20/2022] Open
Abstract
The establishment and maintenance of ion gradients between the interior of lysosomes and the cytosol are crucial for numerous cellular and organismal functions. Numerous ion transport proteins ensure the required variation in luminal concentrations of the different ions along the endocytic pathway to fit the needs of the organelles. Failures in keeping proper ion homeostasis have pathological consequences. Accordingly, several human diseases are caused by the dysfunction of ion transporters. These include osteopetrosis, caused by the dysfunction of Cl-/H+ exchange by the lysosomal transporter ClC-7. To better understand how chloride transport affects lysosomal ion homeostasis and how its disruption impinges on lysosomal function, we developed a mathematical model of lysosomal ion homeostasis including Ca2+ dynamics. The model recapitulates known biophysical properties of ClC-7 and enables the investigation of its differential activation kinetics on lysosomal ion homeostasis. We show that normal functioning of ClC-7 supports the acidification process, is associated with increased luminal concentrations of sodium, potassium, and chloride, and leads to a higher Ca2+ uptake and release. Our model highlights the role of ClC-7 in lysosomal acidification and shows the existence of differential Ca2+ dynamics upon perturbations of Cl-/H+ exchange and its activation kinetics, with possible pathological consequences.
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Affiliation(s)
- Rosario Astaburuaga
- Institute for Theoretical Biology (ITB), Charité-Universitätsmedizin Berlin, Corporate Member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10115 Berlin, Germany.
- Medical Department of Hematology, Oncology and Tumor Immunology, Molekulares Krebsforschungzentrum (MKFZ), Charité-Universitätsmedizin Berlin, Corporate Member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany.
| | - Orlando Daniel Quintanar Haro
- Institute for Theoretical Biology (ITB), Charité-Universitätsmedizin Berlin, Corporate Member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10115 Berlin, Germany.
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, 14195 Berlin, Germany.
| | - Tobias Stauber
- Freie Universität Berlin, Institute of Chemistry and Biochemistry, 14195 Berlin, Germany.
- Department of Human Medicine, Medical School Hamburg, 20457 Hamburg, Germany.
| | - Angela Relógio
- Institute for Theoretical Biology (ITB), Charité-Universitätsmedizin Berlin, Corporate Member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 10115 Berlin, Germany.
- Medical Department of Hematology, Oncology and Tumor Immunology, Molekulares Krebsforschungzentrum (MKFZ), Charité-Universitätsmedizin Berlin, Corporate Member of the Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany.
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133
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Magalhaes I, Yogev O, Mattsson J, Schurich A. The Metabolic Profile of Tumor and Virally Infected Cells Shapes Their Microenvironment Counteracting T Cell Immunity. Front Immunol 2019; 10:2309. [PMID: 31636636 PMCID: PMC6788393 DOI: 10.3389/fimmu.2019.02309] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 09/12/2019] [Indexed: 12/11/2022] Open
Abstract
Upon activation naïve T cells undergo metabolic changes to support the differentiation into subsets of effector or regulatory cells, and enable subsequent metabolic adaptations to form memory. Interfering with these metabolic alterations leads to abrogation or reprogramming of T cell differentiation, demonstrating the importance of these pathways in T cell development. It has long been appreciated that the conversion of a healthy cell to a cancerous cell is accompanied by metabolic changes, which support uncontrolled proliferation. Especially in solid tumors these metabolic changes significantly influence the tumor microenvironment (TME) and affect tumor infiltrating immune cells. The TME is often hypoxic and nutrient depleted, additionally tumor cells produce co-inhibitory signals, together suppressing the immune response. Interestingly, viruses can stimulate a metabolism akin to that seen in tumor cells in their host cells and even in neighboring cells (e.g., via transfer of virally modified extracellular vesicles). Thus, viruses create their own niche which favors viral persistence and propagation, while again keeping the immune response at bay. In this review we will focus on the mechanisms employed by tumor cells and viruses influencing T cell metabolic regulation and the impact they have on shaping T cell fate.
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Affiliation(s)
- Isabelle Magalhaes
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Ohad Yogev
- Division of Infection and Immunity, University College London, London, United Kingdom
| | - Jonas Mattsson
- Department of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden
- Gloria and Seymour Epstein Chair in Cell Therapy and Transplantation, Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ON, Canada
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Anna Schurich
- Department of Infectious Diseases, King's College London, London, United Kingdom
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134
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The Cancer Clock Is (Not) Ticking: Links between Circadian Rhythms and Cancer. Clocks Sleep 2019; 1:435-458. [PMID: 33089179 PMCID: PMC7445810 DOI: 10.3390/clockssleep1040034] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 09/10/2019] [Indexed: 12/23/2022] Open
Abstract
Circadian rhythms regulate many physiological and behavioral processes, including sleep, metabolism and cell division, which have a 24-h oscillation pattern. Rhythmicity is generated by a transcriptional–translational feedback loop in individual cells, which are synchronized by the central pacemaker in the brain and external cues. Epidemiological and clinical studies indicate that disruption of these rhythms can increase both tumorigenesis and cancer progression. Environmental changes (shift work, jet lag, exposure to light at night), mutations in circadian regulating genes, and changes to clock gene expression are recognized forms of disruption and are associated with cancer risk and/or cancer progression. Experimental data in animals and cell cultures further supports the role of the cellular circadian clock in coordinating cell division and DNA repair, and disrupted cellular clocks accelerate cancer cell growth. This review will summarize studies linking circadian disruption to cancer biology and explore how such disruptions may be further altered by common characteristics of tumors including hypoxia and acidosis. We will highlight how circadian rhythms might be exploited for cancer drug development, including how delivery of current chemotherapies may be enhanced using chronotherapy. Understanding the role of circadian rhythms in carcinogenesis and tumor progression will enable us to better understand causes of cancer and how to treat them.
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135
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Angarola B, Ferguson SM. Weak membrane interactions allow Rheb to activate mTORC1 signaling without major lysosome enrichment. Mol Biol Cell 2019; 30:2750-2760. [PMID: 31532697 PMCID: PMC6789162 DOI: 10.1091/mbc.e19-03-0146] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Stable localization of the Rheb GTPase to lysosomes is thought to be required for activation of mTOR complex 1 (mTORC1) signaling. However, the lysosome targeting mechanisms for Rheb remain unclear. We therefore investigated the relationship between Rheb subcellular localization and mTORC1 activation. Surprisingly, we found that Rheb was undetectable at lysosomes. Nonetheless, functional assays in knockout human cells revealed that farnesylation of the C-terminal CaaX motif on Rheb was essential for Rheb-dependent mTORC1 activation. Although farnesylated Rheb exhibited partial endoplasmic reticulum (ER) localization, constitutively targeting Rheb to ER membranes did not support mTORC1 activation. Further systematic analysis of Rheb lipidation revealed that weak, nonselective, membrane interactions support Rheb-dependent mTORC1 activation without the need for a specific lysosome targeting motif. Collectively, these results argue against stable interactions of Rheb with lysosomes and instead that transient membrane interactions optimally allow Rheb to activate mTORC1 signaling.
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Affiliation(s)
- Brittany Angarola
- Departments of Cell Biology and Neuroscience, Yale University School of Medicine, New Haven, CT 06510
| | - Shawn M Ferguson
- Departments of Cell Biology and Neuroscience, Yale University School of Medicine, New Haven, CT 06510
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136
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Reina-Campos M, Diaz-Meco MT, Moscat J. The Dual Roles of the Atypical Protein Kinase Cs in Cancer. Cancer Cell 2019; 36:218-235. [PMID: 31474570 PMCID: PMC6751000 DOI: 10.1016/j.ccell.2019.07.010] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/24/2019] [Accepted: 07/30/2019] [Indexed: 02/08/2023]
Abstract
Atypical protein kinase C (aPKC) isozymes, PKCλ/ι and PKCζ, are now considered fundamental regulators of tumorigenesis. However, the specific separation of functions that determine their different roles in cancer is still being unraveled. Both aPKCs have pleiotropic context-dependent functions that can translate into tumor-promoter or -suppressive functions. Here, we review early and more recent literature to discuss how the different tumor types, and their microenvironments, might account for the selective signaling of each aPKC isotype. This is of clinical relevance because a better understanding of the roles of these kinases is essential for the design of new anti-cancer treatments.
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Affiliation(s)
- Miguel Reina-Campos
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Maria T Diaz-Meco
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jorge Moscat
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA.
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137
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Abstract
Numerous physiological functions exhibit substantial circadian oscillations. In the kidneys, renal plasma flow, the glomerular filtration rate and tubular reabsorption and/or secretion processes have been shown to peak during the active phase and decline during the inactive phase. These functional rhythms are driven, at least in part, by a self-sustaining cellular mechanism termed the circadian clock. The circadian clock controls different cellular functions, including transcription, translation and protein post-translational modifications (such as phosphorylation, acetylation and ubiquitylation) and degradation. Disruption of the circadian clock in animal models results in the loss of blood pressure control and substantial changes in the circadian pattern of water and electrolyte excretion in the urine. Kidney-specific suppression of the circadian clock in animals implicates both the intrinsic renal and the extrarenal circadian clocks in these pathologies. Alterations in the circadian rhythm of renal functions are associated with the development of hypertension, chronic kidney disease, renal fibrosis and kidney stones. Furthermore, renal circadian clocks might interfere with the pharmacokinetics and/or pharmacodynamics of various drugs and are therefore an important consideration in the treatment of some renal diseases or disorders.
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Affiliation(s)
- Dmitri Firsov
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland.
| | - Olivier Bonny
- Department of Pharmacology and Toxicology, University of Lausanne, Lausanne, Switzerland. .,Service of Nephrology, Department of Medicine, Lausanne University Hospital, Lausanne, Switzerland.
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138
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Sulli G, Lam MTY, Panda S. Interplay between Circadian Clock and Cancer: New Frontiers for Cancer Treatment. Trends Cancer 2019; 5:475-494. [PMID: 31421905 DOI: 10.1016/j.trecan.2019.07.002] [Citation(s) in RCA: 255] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 07/07/2019] [Accepted: 07/08/2019] [Indexed: 12/23/2022]
Abstract
Circadian clocks constitute the evolutionary molecular machinery that dictates the temporal regulation of physiology to maintain homeostasis. Disruption of the circadian rhythm plays a key role in tumorigenesis and facilitates the establishment of cancer hallmarks. Conversely, oncogenic processes directly weaken circadian rhythms. Pharmacological modulation of core clock genes is a new approach in cancer therapy. The integration of circadian biology into cancer research offers new options for making cancer treatment more effective, encompassing the prevention, diagnosis, and treatment of this devastating disease. This review highlights the role of the circadian clock in tumorigenesis and cancer hallmarks, and discusses how pharmacological modulation of circadian clock genes can lead to new therapeutic options.
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Affiliation(s)
- Gabriele Sulli
- The Salk Institute for Biological Studies, La Jolla, CA, USA; Department of Medicine, Division of Regenerative Medicine, Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, USA; Scintillon Institute, San Diego, CA 92121, USA.
| | - Michael Tun Yin Lam
- The Salk Institute for Biological Studies, La Jolla, CA, USA; Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego, 9300 Campus Point Drive, La Jolla, CA 92037, USA
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139
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Rethineswaran VK, Kim YJ, Jang WB, Ji ST, Kang S, Kim DY, Park JH, Van LTH, Giang LTT, Ha JS, Yun J, Lee DH, Yu SN, Park SG, Ahn SC, Kwon SM. Enzyme-Aided Extraction of Fucoidan by AMG Augments the Functionality of EPCs through Regulation of the AKT/Rheb Signaling Pathway. Mar Drugs 2019; 17:md17070392. [PMID: 31277207 PMCID: PMC6669526 DOI: 10.3390/md17070392] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 06/26/2019] [Accepted: 06/28/2019] [Indexed: 12/21/2022] Open
Abstract
The purpose of the present study is to improve the endothelial progenitor cells (EPC) activation, proliferation, and angiogenesis using enzyme-aided extraction of fucoidan by amyloglucosidase (EAEF-AMG). Enzyme-aided extraction of fucoidan by AMG (EAEF-AMG) significantly increased EPC proliferation by reducing the reactive oxygen species (ROS) and decreasing apoptosis. Notably, EAEF-AMG treated EPCs repressed the colocalization of TSC2/LAMP1 and promoted perinuclear localization of mTOR/LAMP1 and mTOR/Rheb. Moreover, EAEF-AMG enhanced EPC functionalities, including tube formation, cell migration, and wound healing via regulation of AKT/Rheb signaling. Our data provided cell priming protocols to enhance therapeutic applications of EPCs using bioactive compounds for the treatment of CVD.
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Affiliation(s)
- Vinoth Kumar Rethineswaran
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Yeon-Ju Kim
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Woong Bi Jang
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Seung Taek Ji
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Songhwa Kang
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Da Yeon Kim
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Ji Hye Park
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Le Thi Hong Van
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Ly Thanh Truong Giang
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Jong Seong Ha
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Jisoo Yun
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea
| | - Dong Hyung Lee
- Department of Obstetrics and Gynecology, Biomedical Research Institute, Pusan National University School of Medicine, Busan 46241, Korea
| | - Sun-Nyoung Yu
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan 50612, Korea
| | - Sul-Gi Park
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan 50612, Korea
| | - Soon-Cheol Ahn
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan 50612, Korea
| | - Sang-Mo Kwon
- Convergence Stem Cell Research Center, Pusan National University, Yangsan 50612, Korea.
- Laboratory for Vascular Medicine and Stem Cell Biology, Department of Physiology, School of Medicine, Pusan National University, Yangsan 50612, Korea.
- Research Institute of Convergence Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan 50612, Korea.
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140
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Walton ZE, Brooks RC, Dang CV. mTOR Senses Intracellular pH through Lysosome Dispersion from RHEB. Bioessays 2019; 41:e1800265. [PMID: 31157925 PMCID: PMC6730656 DOI: 10.1002/bies.201800265] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/18/2019] [Indexed: 02/04/2023]
Abstract
Acidity, generated in hypoxia or hypermetabolic states, perturbs homeostasis and is a feature of solid tumors. That acid peripherally disperses lysosomes is a three-decade-old observation, yet one little understood or appreciated. However, recent work has recognized the inhibitory impact this spatial redistribution has on mechanistic target of rapamycin complex 1 (mTORC1), a key regulator of metabolism. This finding argues for a paradigm shift in localization of mTORC1 activator Ras homolog enriched in brain (RHEB), a conclusion several others have now independently reached. Thus, mTORC1, known to sense amino acids, mitogens, and energy to restrict biosynthesis to times of adequate resources, also senses pH and, via dampened mTOR-governed synthesis of clock proteins, regulates the circadian clock to achieve concerted responses to metabolic stress. While this may allow cancer to endure metabolic deprivation, immune cell mTOR signaling likewise exhibits pH sensitivity, suggesting that suppression of antitumor immune function by solid tumor acidity may additionally fuel cancers, an obstacle potentially reversible through therapeutic pH manipulation.
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Affiliation(s)
| | | | - Chi V. Dang
- Ludwig Institute for Cancer Research, New York, NY 10017
- The Wistar Institute, Philadelphia, PA 19104
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141
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Abstract
PURPOSE OF REVIEW The purpose of this review is to provide a brief summary about the current state of knowledge regarding the circadian rhythm in the regulation of normal renal function. RECENT FINDINGS There is a lack of information regarding how the circadian clock mechanisms may contribute to the development of diabetic kidney disease. We discuss recent findings regarding mechanisms that are established in diabetic kidney disease and are known to be linked to the circadian clock as possible connections between these two areas. Here, we hypothesize various mechanisms that may provide a link between the clock mechanism and kidney disease in diabetes based on available data from humans and rodent models.
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Affiliation(s)
- Olanrewaju A Olaoye
- Department of Medicine, Division of Nephrology, Hypertension, and Renal Transplantation, University of Florida, 1600 SW Archer Road, Box 100224, Gainesville, FL, 32610, USA
| | - Sarah H Masten
- Department of Medicine, Division of Nephrology, Hypertension, and Renal Transplantation, University of Florida, 1600 SW Archer Road, Box 100224, Gainesville, FL, 32610, USA
| | - Rajesh Mohandas
- Department of Medicine, Division of Nephrology, Hypertension, and Renal Transplantation, University of Florida, 1600 SW Archer Road, Box 100224, Gainesville, FL, 32610, USA
- North Florida/South Georgia Veterans Health System, Gainesville, FL, USA
| | - Michelle L Gumz
- Department of Medicine, Division of Nephrology, Hypertension, and Renal Transplantation, University of Florida, 1600 SW Archer Road, Box 100224, Gainesville, FL, 32610, USA.
- North Florida/South Georgia Veterans Health System, Gainesville, FL, USA.
- Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL, USA.
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142
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Abstract
The extracellular pH of solid tumors is unequivocally acidic due to a combination of high rates of lactic acid production (a consequence of fermentative glycolytic metabolism) and poor perfusion. This has been documented by us and others in a wide variety of solid tumor models, primarily using magnetic resonance spectroscopic imaging (MRSI). This acidity contributes to tumor progression by inducing genome instability, promoting local invasion and metastases, inhibiting anti-tumor immunity, and conferring resistance to chemo- and radio-therapies. Systemic buffer therapies can neutralize tumor acidity and has been shown to inhibit local invasion and metastasis and improve immune surveillance in a variety of cancer model systems. This review will revisit the causes and consequences of acidosis by summarizing strategies used by cancer cells to adapt to acidosis, and how this acidity associated with carcinogenesis, metastasis, and immune function. Finally, this review will discuss how neutralization of acidity can be used to inhibit carcinogenesis and metastasis and improve anti-cancer immunotherapy.
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Affiliation(s)
- Arig Ibrahim-Hashim
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Avenue, Tampa, FL, 33612, USA.
- Department of Oncological Sciences, University of South Florida, Tampa, FL, USA.
| | - Veronica Estrella
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Avenue, Tampa, FL, 33612, USA
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143
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Pillai SR, Damaghi M, Marunaka Y, Spugnini EP, Fais S, Gillies RJ. Causes, consequences, and therapy of tumors acidosis. Cancer Metastasis Rev 2019; 38:205-222. [PMID: 30911978 PMCID: PMC6625890 DOI: 10.1007/s10555-019-09792-7] [Citation(s) in RCA: 187] [Impact Index Per Article: 37.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
While cancer is commonly described as "a disease of the genes," it is also associated with massive metabolic reprogramming that is now accepted as a disease "Hallmark." This programming is complex and often involves metabolic cooperativity between cancer cells and their surrounding stroma. Indeed, there is emerging clinical evidence that interrupting a cancer's metabolic program can improve patients' outcomes. The most commonly observed and well-studied metabolic adaptation in cancers is the fermentation of glucose to lactic acid, even in the presence of oxygen, also known as "aerobic glycolysis" or the "Warburg Effect." Much has been written about the mechanisms of the Warburg effect, and this remains a topic of great debate. However, herein, we will focus on an important sequela of this metabolic program: the acidification of the tumor microenvironment. Rather than being an epiphenomenon, it is now appreciated that this acidosis is a key player in cancer somatic evolution and progression to malignancy. Adaptation to acidosis induces and selects for malignant behaviors, such as increased invasion and metastasis, chemoresistance, and inhibition of immune surveillance. However, the metabolic reprogramming that occurs during adaptation to acidosis also introduces therapeutic vulnerabilities. Thus, tumor acidosis is a relevant therapeutic target, and we describe herein four approaches to accomplish this: (1) neutralizing acid directly with buffers, (2) targeting metabolic vulnerabilities revealed by acidosis, (3) developing acid-activatable drugs and nanomedicines, and (4) inhibiting metabolic processes responsible for generating acids in the first place.
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Affiliation(s)
- Smitha R Pillai
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL, 33602, USA
| | - Mehdi Damaghi
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL, 33602, USA
| | - Yoshinori Marunaka
- Research Institute for Clinical Physiology, Kyoto, 604-8472, Japan
- Research Center for Drug Discovery and Pharmaceutical Development Science, Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, 525-8577, Japan
- Department of Molecular Cell Physiology, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan
| | | | - Stefano Fais
- Department of Oncology and Molecular Medicine, Istituto Superiore di Sanità (National Institute of Health), Viale Regina Elena, 299, 00161, Rome, Italy.
| | - Robert J Gillies
- Department of Cancer Physiology, H. Lee Moffitt Cancer Center and Research Institute, 12902 Magnolia Dr., Tampa, FL, 33602, USA.
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144
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Affiliation(s)
- Rebekah C Brooks
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Ludwig Institute for Cancer Research, New York, NY, USA.,The Wistar Institute, Philadelphia, PA, USA
| | - Chi V Dang
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Ludwig Institute for Cancer Research, New York, NY, USA.,The Wistar Institute, Philadelphia, PA, USA
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145
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Lysosome Positioning Influences mTORC2 and AKT Signaling. Mol Cell 2019; 75:26-38.e3. [PMID: 31130364 DOI: 10.1016/j.molcel.2019.05.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/18/2019] [Accepted: 04/16/2019] [Indexed: 12/20/2022]
Abstract
Growth factor signaling is initiated at the plasma membrane and propagated through the cytoplasm for eventual relay to intracellular organelles such as lysosomes. The serine/threonine kinase mTOR participates in growth factor signaling as a component of two multi-subunit complexes, mTORC1 and mTORC2. mTORC1 associates with lysosomes, and its activity depends on the positioning of lysosomes within the cytoplasm, although there is no consensus regarding the exact effect of perinuclear versus peripheral distribution. mTORC2 and its substrate kinase AKT have a widespread distribution, but they are thought to act mainly at the plasma membrane. Using cell lines with knockout of components of the lysosome-positioning machinery, we show that perinuclear clustering of lysosomes delays reactivation of not only mTORC1, but also mTORC2 and AKT upon serum replenishment. These experiments demonstrate the existence of pools of mTORC2 and AKT that are sensitive to lysosome positioning.
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146
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Chafe SC, McDonald PC, Saberi S, Nemirovsky O, Venkateswaran G, Burugu S, Gao D, Delaidelli A, Kyle AH, Baker JHE, Gillespie JA, Bashashati A, Minchinton AI, Zhou Y, Shah SP, Dedhar S. Targeting Hypoxia-Induced Carbonic Anhydrase IX Enhances Immune-Checkpoint Blockade Locally and Systemically. Cancer Immunol Res 2019; 7:1064-1078. [PMID: 31088846 DOI: 10.1158/2326-6066.cir-18-0657] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/19/2019] [Accepted: 05/09/2019] [Indexed: 11/16/2022]
Abstract
Treatment strategies involving immune-checkpoint blockade (ICB) have significantly improved survival for a subset of patients across a broad spectrum of advanced solid cancers. Despite this, considerable room for improving response rates remains. The tumor microenvironment (TME) is a hurdle to immune function, as the altered metabolism-related acidic microenvironment of solid tumors decreases immune activity. Here, we determined that expression of the hypoxia-induced, cell-surface pH regulatory enzyme carbonic anhydrase IX (CAIX) is associated with worse overall survival in a cohort of 449 patients with melanoma. We found that targeting CAIX with the small-molecule SLC-0111 reduced glycolytic metabolism of tumor cells and extracellular acidification, resulting in increased immune cell killing. SLC-0111 treatment in combination with immune-checkpoint inhibitors led to the sensitization of tumors to ICB, which led to an enhanced Th1 response, decreased tumor growth, and reduced metastasis. We identified that increased expression of CA9 is associated with a reduced Th1 response in metastatic melanoma and basal-like breast cancer TCGA cohorts. These data suggest that targeting CAIX in the TME in combination with ICB is a potential therapeutic strategy for enhancing response and survival in patients with hypoxic solid malignancies.
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Affiliation(s)
- Shawn C Chafe
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Paul C McDonald
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Saeed Saberi
- Department of Molecular Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Oksana Nemirovsky
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Geetha Venkateswaran
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Samantha Burugu
- Genetic Pathology Evaluation Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Dongxia Gao
- Genetic Pathology Evaluation Centre, University of British Columbia, Vancouver, British Columbia, Canada
| | - Alberto Delaidelli
- Department of Molecular Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Alastair H Kyle
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Jennifer H E Baker
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Jordan A Gillespie
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Ali Bashashati
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Andrew I Minchinton
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada
| | - Youwen Zhou
- Department of Dermatology and Skin Science, Vancouver Coastal Health Research Institute, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sohrab P Shah
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Shoukat Dedhar
- Department of Integrative Oncology, BC Cancer Research Centre, Vancouver, British Columbia, Canada. .,Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
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147
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Iron regulatory protein 2 modulates the switch from aerobic glycolysis to oxidative phosphorylation in mouse embryonic fibroblasts. Proc Natl Acad Sci U S A 2019; 116:9871-9876. [PMID: 31040213 DOI: 10.1073/pnas.1820051116] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
The importance of the role of iron regulatory proteins (IRPs) in mitochondrial iron homeostasis and function has been raised. To understand how an IRP affects mitochondrial function, we used globally Irp2-depleted mouse embryonic fibroblasts (MEFs) and found that Irp2 ablation significantly induced the expression of both hypoxia-inducible factor subunits, Hif1α and Hif2α. The increase of Hif1α up-regulated its targeted genes, enhancing glycolysis, and the increase of Hif2α down-regulated the expression of iron-sulfur cluster (Fe-S) biogenesis-related and electron transport chain (ETC)-related genes, weakening mitochondrial respiration. Inhibition of Hif1α by genetic knockdown or a specific inhibitor prevented Hif1α-targeted gene expression, leading to decreased aerobic glycolysis. Inhibition of Hif2α by genetic knockdown or selective disruption of the heterodimerization of Hif2α and Hif1β restored the mitochondrial ETC and coupled oxidative phosphorylation (OXPHOS) by enhancing Fe-S biogenesis and increasing ETC-related gene expression. Our results indicate that Irp2 modulates the metabolic switch from aerobic glycolysis to OXPHOS that is mediated by Hif1α and Hif2α in MEFs.
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148
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Rohani N, Hao L, Alexis MS, Joughin BA, Krismer K, Moufarrej MN, Soltis AR, Lauffenburger DA, Yaffe MB, Burge CB, Bhatia SN, Gertler FB. Acidification of Tumor at Stromal Boundaries Drives Transcriptome Alterations Associated with Aggressive Phenotypes. Cancer Res 2019; 79:1952-1966. [PMID: 30755444 PMCID: PMC6467770 DOI: 10.1158/0008-5472.can-18-1604] [Citation(s) in RCA: 148] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 09/19/2018] [Accepted: 02/06/2019] [Indexed: 01/07/2023]
Abstract
Acidosis is a fundamental feature of the tumor microenvironment, which directly regulates tumor cell invasion by affecting immune cell function, clonal cell evolution, and drug resistance. Despite the important association of tumor microenvironment acidosis with tumor cell invasion, relatively little is known regarding which areas within a tumor are acidic and how acidosis influences gene expression to promote invasion. Here, we injected a labeled pH-responsive peptide to mark acidic regions within tumors. Surprisingly, acidic regions were not restricted to hypoxic areas and overlapped with highly proliferative, invasive regions at the tumor-stroma interface, which were marked by increased expression of matrix metalloproteinases and degradation of the basement membrane. RNA-seq analysis of cells exposed to low pH conditions revealed a general rewiring of the transcriptome that involved RNA splicing and enriched for targets of RNA binding proteins with specificity for AU-rich motifs. Alternative splicing of Mena and CD44, which play important isoform-specific roles in metastasis and drug resistance, respectively, was sensitive to histone acetylation status. Strikingly, this program of alternative splicing was reversed in vitro and in vivo through neutralization experiments that mitigated acidic conditions. These findings highlight a previously underappreciated role for localized acidification of tumor microenvironment in the expression of an alternative splicing-dependent tumor invasion program. SIGNIFICANCE: This study expands our understanding of acidosis within the tumor microenvironment and indicates that acidosis induces potentially therapeutically actionable changes to alternative splicing.
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Affiliation(s)
- Nazanin Rohani
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts.
| | - Liangliang Hao
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Maria S Alexis
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
| | - Brian A Joughin
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
- Center for Precision Cancer Medicine, MIT, Cambridge, Massachusetts
| | - Konstantin Krismer
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
- Center for Precision Cancer Medicine, MIT, Cambridge, Massachusetts
- Computer Science and Artificial Intelligence Laboratory, MIT, Cambridge, Massachusetts
| | - Mira N Moufarrej
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
| | - Anthony R Soltis
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
| | | | - Michael B Yaffe
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts
- Department of Biological Engineering, MIT, Cambridge, Massachusetts
- Center for Precision Cancer Medicine, MIT, Cambridge, Massachusetts
- Department of Biology, MIT, Cambridge, Massachusetts
- Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts
| | | | - Sangeeta N Bhatia
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts
- Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, Massachusetts
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
- Howard Hughes Medical Institute, Cambridge, Massachusetts
| | - Frank B Gertler
- Koch Institute for Integrative Cancer Research, MIT, Cambridge, Massachusetts.
- Department of Biology, MIT, Cambridge, Massachusetts
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149
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Reina-Campos M, Linares JF, Duran A, Cordes T, L'Hermitte A, Badur MG, Bhangoo MS, Thorson PK, Richards A, Rooslid T, Garcia-Olmo DC, Nam-Cha SY, Salinas-Sanchez AS, Eng K, Beltran H, Scott DA, Metallo CM, Moscat J, Diaz-Meco MT. Increased Serine and One-Carbon Pathway Metabolism by PKCλ/ι Deficiency Promotes Neuroendocrine Prostate Cancer. Cancer Cell 2019; 35:385-400.e9. [PMID: 30827887 PMCID: PMC6424636 DOI: 10.1016/j.ccell.2019.01.018] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 11/13/2018] [Accepted: 01/28/2019] [Indexed: 12/18/2022]
Abstract
Increasingly effective therapies targeting the androgen receptor have paradoxically promoted the incidence of neuroendocrine prostate cancer (NEPC), the most lethal subtype of castration-resistant prostate cancer (PCa), for which there is no effective therapy. Here we report that protein kinase C (PKC)λ/ι is downregulated in de novo and during therapy-induced NEPC, which results in the upregulation of serine biosynthesis through an mTORC1/ATF4-driven pathway. This metabolic reprogramming supports cell proliferation and increases intracellular S-adenosyl methionine (SAM) levels to feed epigenetic changes that favor the development of NEPC characteristics. Altogether, we have uncovered a metabolic vulnerability triggered by PKCλ/ι deficiency in NEPC, which offers potentially actionable targets to prevent therapy resistance in PCa.
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Affiliation(s)
- Miguel Reina-Campos
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA; Sanford Burnham Prebys Graduate School of Biomedical Sciences, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Juan F Linares
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Angeles Duran
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Thekla Cordes
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Antoine L'Hermitte
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Mehmet G Badur
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Munveer S Bhangoo
- Division of Hematology-Oncology Scripps Clinic, 10666 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Phataraporn K Thorson
- Depatment of Pathology, Scripps Clinic Medical Group, 10666 Torrey Pines Road, La Jolla, CA 92037, USA
| | - Alicia Richards
- Proteomics Facility, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Tarmo Rooslid
- Conrad Prebys Center for Drug Discovery, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Dolores C Garcia-Olmo
- Centre de Recerca Experimental Biomèdica Aplicada (CREBA), IRBLLEIDA, 25138 Lleida, Spain
| | - Syongh Y Nam-Cha
- Pathology Department, Director of the Research Unit Biobank, University of Castilla-La Mancha, School of Medicine, 02006 Albacete, Spain
| | - Antonio S Salinas-Sanchez
- Urology Department, Research Unit, University Hospital Complex of Albacete, School of Medicine, 02006 Albacete, Spain
| | - Ken Eng
- Department of Computational Biomedicine, Weill Cornell Medicine, New York, NY 10065, USA
| | - Himisha Beltran
- Department of Medical Oncology, Dana Farber Cancer Institute, Harvard Medical School, Boston, MA 02215, USA
| | - David A Scott
- Cancer Metabolism Core, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Christian M Metallo
- Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA
| | - Jorge Moscat
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Maria T Diaz-Meco
- Cancer Metabolism and Signaling Networks Program, Sanford Burnham Prebys Medical Discovery Institute, 10901 N. Torrey Pines Road, La Jolla, CA 92037, USA.
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150
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Wilde BR, Ye Z, Lim TY, Ayer DE. Cellular acidosis triggers human MondoA transcriptional activity by driving mitochondrial ATP production. eLife 2019; 8:40199. [PMID: 30717828 PMCID: PMC6363388 DOI: 10.7554/elife.40199] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 01/22/2019] [Indexed: 12/12/2022] Open
Abstract
Human MondoA requires glucose as well as other modulatory signals to function in transcription. One such signal is acidosis, which increases MondoA activity and also drives a protective gene signature in breast cancer. How low pH controls MondoA transcriptional activity is unknown. We found that low pH medium increases mitochondrial ATP (mtATP), which is subsequently exported from the mitochondrial matrix. Mitochondria-bound hexokinase transfers a phosphate from mtATP to cytoplasmic glucose to generate glucose-6-phosphate (G6P), which is an established MondoA activator. The outer mitochondrial membrane localization of MondoA suggests that it is positioned to coordinate the adaptive transcriptional response to a cell’s most abundant energy sources, cytoplasmic glucose and mtATP. In response to acidosis, MondoA shows preferential binding to just two targets, TXNIP and its paralog ARRDC4. Because these transcriptional targets are suppressors of glucose uptake, we propose that MondoA is critical for restoring metabolic homeostasis in response to high energy charge.
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Affiliation(s)
- Blake R Wilde
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, United States
| | - Zhizhou Ye
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, United States
| | - Tian-Yeh Lim
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, United States
| | - Donald E Ayer
- Department of Oncological Sciences, Huntsman Cancer Institute, University of Utah, Salt Lake City, United States
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